HP 32SII Repair

[MikeD]

Thank you Ian! That was very helpful. Reducing contrast in that way returned the display to a normal appearance. I wasn't even aware of that feature. I did eventually find the owner's manual for the calculator and found the section on testing operation of the calculator. Performing a reset (holding C and pressing ln key repeatedly) seems to have got it reset and functional again. It passes the self tests now. I believe what happened is during reassembly I probably pressed a lot of keys inadvertently (and simultaneously) and put it in a very confused state. No doubt I should have removed the batteries beforehand. Many thanks Ian!